Question

7.According to Joule’s law heat is directly proportional to resistance. But the

heat decrease even after increasing the resistance in some cases. Why?​

Answer 1

hlo mate according to me your answer could be that

According to joule law heat is directly proportional to the resistance means resistance increase with inc. in heat however in some case like semiconductor heat decreases on inc. in resistances becoz

As the temperature of the semi-conductor is increased, the electrons in the valence band gain sufficient energy to escape from the confines of their atoms. As a result, in highertemperatures, a semi-conductor's valence electrons are free conduction results, resistivity decreases on inc. in heat

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